1/* crypto/x509/x509_att.c */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to.  The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 *    notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 *    notice, this list of conditions and the following disclaimer in the
30 *    documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 *    must display the following acknowledgement:
33 *    "This product includes cryptographic software written by
34 *     Eric Young (eay@cryptsoft.com)"
35 *    The word 'cryptographic' can be left out if the rouines from the library
36 *    being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 *    the apps directory (application code) you must include an acknowledgement:
39 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed.  i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59#include <stdio.h>
60#include <openssl/stack.h>
61#include "cryptlib.h"
62#include <openssl/asn1.h>
63#include <openssl/objects.h>
64#include <openssl/evp.h>
65#include <openssl/x509.h>
66#include <openssl/x509v3.h>
67
68int X509at_get_attr_count(const STACK_OF(X509_ATTRIBUTE) *x)
69{
70	if (!x) return 0;
71	return(sk_X509_ATTRIBUTE_num(x));
72}
73
74int X509at_get_attr_by_NID(const STACK_OF(X509_ATTRIBUTE) *x, int nid,
75			  int lastpos)
76{
77	ASN1_OBJECT *obj;
78
79	obj=OBJ_nid2obj(nid);
80	if (obj == NULL) return(-2);
81	return(X509at_get_attr_by_OBJ(x,obj,lastpos));
82}
83
84int X509at_get_attr_by_OBJ(const STACK_OF(X509_ATTRIBUTE) *sk, ASN1_OBJECT *obj,
85			  int lastpos)
86{
87	int n;
88	X509_ATTRIBUTE *ex;
89
90	if (sk == NULL) return(-1);
91	lastpos++;
92	if (lastpos < 0)
93		lastpos=0;
94	n=sk_X509_ATTRIBUTE_num(sk);
95	for ( ; lastpos < n; lastpos++)
96		{
97		ex=sk_X509_ATTRIBUTE_value(sk,lastpos);
98		if (OBJ_cmp(ex->object,obj) == 0)
99			return(lastpos);
100		}
101	return(-1);
102}
103
104X509_ATTRIBUTE *X509at_get_attr(const STACK_OF(X509_ATTRIBUTE) *x, int loc)
105{
106	if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
107		return NULL;
108	else
109		return sk_X509_ATTRIBUTE_value(x,loc);
110}
111
112X509_ATTRIBUTE *X509at_delete_attr(STACK_OF(X509_ATTRIBUTE) *x, int loc)
113{
114	X509_ATTRIBUTE *ret;
115
116	if (x == NULL || sk_X509_ATTRIBUTE_num(x) <= loc || loc < 0)
117		return(NULL);
118	ret=sk_X509_ATTRIBUTE_delete(x,loc);
119	return(ret);
120}
121
122STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr(STACK_OF(X509_ATTRIBUTE) **x,
123					 X509_ATTRIBUTE *attr)
124{
125	X509_ATTRIBUTE *new_attr=NULL;
126	STACK_OF(X509_ATTRIBUTE) *sk=NULL;
127
128	if ((x != NULL) && (*x == NULL))
129		{
130		if ((sk=sk_X509_ATTRIBUTE_new_null()) == NULL)
131			goto err;
132		}
133	else
134		sk= *x;
135
136	if ((new_attr=X509_ATTRIBUTE_dup(attr)) == NULL)
137		goto err2;
138	if (!sk_X509_ATTRIBUTE_push(sk,new_attr))
139		goto err;
140	if ((x != NULL) && (*x == NULL))
141		*x=sk;
142	return(sk);
143err:
144	X509err(X509_F_X509_ADD_ATTR,ERR_R_MALLOC_FAILURE);
145err2:
146	if (new_attr != NULL) X509_ATTRIBUTE_free(new_attr);
147	if (sk != NULL) sk_X509_ATTRIBUTE_free(sk);
148	return(NULL);
149}
150
151STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_OBJ(STACK_OF(X509_ATTRIBUTE) **x,
152			const ASN1_OBJECT *obj, int type,
153			const unsigned char *bytes, int len)
154{
155	X509_ATTRIBUTE *attr;
156	STACK_OF(X509_ATTRIBUTE) *ret;
157	attr = X509_ATTRIBUTE_create_by_OBJ(NULL, obj, type, bytes, len);
158	if(!attr) return 0;
159	ret = X509at_add1_attr(x, attr);
160	X509_ATTRIBUTE_free(attr);
161	return ret;
162}
163
164STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_NID(STACK_OF(X509_ATTRIBUTE) **x,
165			int nid, int type,
166			const unsigned char *bytes, int len)
167{
168	X509_ATTRIBUTE *attr;
169	STACK_OF(X509_ATTRIBUTE) *ret;
170	attr = X509_ATTRIBUTE_create_by_NID(NULL, nid, type, bytes, len);
171	if(!attr) return 0;
172	ret = X509at_add1_attr(x, attr);
173	X509_ATTRIBUTE_free(attr);
174	return ret;
175}
176
177STACK_OF(X509_ATTRIBUTE) *X509at_add1_attr_by_txt(STACK_OF(X509_ATTRIBUTE) **x,
178			const char *attrname, int type,
179			const unsigned char *bytes, int len)
180{
181	X509_ATTRIBUTE *attr;
182	STACK_OF(X509_ATTRIBUTE) *ret;
183	attr = X509_ATTRIBUTE_create_by_txt(NULL, attrname, type, bytes, len);
184	if(!attr) return 0;
185	ret = X509at_add1_attr(x, attr);
186	X509_ATTRIBUTE_free(attr);
187	return ret;
188}
189
190X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_NID(X509_ATTRIBUTE **attr, int nid,
191	     int atrtype, const void *data, int len)
192{
193	ASN1_OBJECT *obj;
194	X509_ATTRIBUTE *ret;
195
196	obj=OBJ_nid2obj(nid);
197	if (obj == NULL)
198		{
199		X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_NID,X509_R_UNKNOWN_NID);
200		return(NULL);
201		}
202	ret=X509_ATTRIBUTE_create_by_OBJ(attr,obj,atrtype,data,len);
203	if (ret == NULL) ASN1_OBJECT_free(obj);
204	return(ret);
205}
206
207X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_OBJ(X509_ATTRIBUTE **attr,
208	     const ASN1_OBJECT *obj, int atrtype, const void *data, int len)
209{
210	X509_ATTRIBUTE *ret;
211
212	if ((attr == NULL) || (*attr == NULL))
213		{
214		if ((ret=X509_ATTRIBUTE_new()) == NULL)
215			{
216			X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_OBJ,ERR_R_MALLOC_FAILURE);
217			return(NULL);
218			}
219		}
220	else
221		ret= *attr;
222
223	if (!X509_ATTRIBUTE_set1_object(ret,obj))
224		goto err;
225	if (!X509_ATTRIBUTE_set1_data(ret,atrtype,data,len))
226		goto err;
227
228	if ((attr != NULL) && (*attr == NULL)) *attr=ret;
229	return(ret);
230err:
231	if ((attr == NULL) || (ret != *attr))
232		X509_ATTRIBUTE_free(ret);
233	return(NULL);
234}
235
236X509_ATTRIBUTE *X509_ATTRIBUTE_create_by_txt(X509_ATTRIBUTE **attr,
237		const char *atrname, int type, const unsigned char *bytes, int len)
238	{
239	ASN1_OBJECT *obj;
240	X509_ATTRIBUTE *nattr;
241
242	obj=OBJ_txt2obj(atrname, 0);
243	if (obj == NULL)
244		{
245		X509err(X509_F_X509_ATTRIBUTE_CREATE_BY_TXT,
246						X509_R_INVALID_FIELD_NAME);
247		ERR_add_error_data(2, "name=", atrname);
248		return(NULL);
249		}
250	nattr = X509_ATTRIBUTE_create_by_OBJ(attr,obj,type,bytes,len);
251	ASN1_OBJECT_free(obj);
252	return nattr;
253	}
254
255int X509_ATTRIBUTE_set1_object(X509_ATTRIBUTE *attr, const ASN1_OBJECT *obj)
256{
257	if ((attr == NULL) || (obj == NULL))
258		return(0);
259	ASN1_OBJECT_free(attr->object);
260	attr->object=OBJ_dup(obj);
261	return(1);
262}
263
264int X509_ATTRIBUTE_set1_data(X509_ATTRIBUTE *attr, int attrtype, const void *data, int len)
265{
266	ASN1_TYPE *ttmp;
267	ASN1_STRING *stmp;
268	int atype;
269	if (!attr) return 0;
270	if(attrtype & MBSTRING_FLAG) {
271		stmp = ASN1_STRING_set_by_NID(NULL, data, len, attrtype,
272						OBJ_obj2nid(attr->object));
273		if(!stmp) {
274			X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_ASN1_LIB);
275			return 0;
276		}
277		atype = stmp->type;
278	} else {
279		if(!(stmp = ASN1_STRING_type_new(attrtype))) goto err;
280		if(!ASN1_STRING_set(stmp, data, len)) goto err;
281		atype = attrtype;
282	}
283	if(!(attr->value.set = sk_ASN1_TYPE_new_null())) goto err;
284	if(!(ttmp = ASN1_TYPE_new())) goto err;
285	if(!sk_ASN1_TYPE_push(attr->value.set, ttmp)) goto err;
286	attr->single = 0;
287	ASN1_TYPE_set(ttmp, atype, stmp);
288	return 1;
289	err:
290	X509err(X509_F_X509_ATTRIBUTE_SET1_DATA, ERR_R_MALLOC_FAILURE);
291	return 0;
292}
293
294int X509_ATTRIBUTE_count(X509_ATTRIBUTE *attr)
295{
296	if(!attr->single) return sk_ASN1_TYPE_num(attr->value.set);
297	if(attr->value.single) return 1;
298	return 0;
299}
300
301ASN1_OBJECT *X509_ATTRIBUTE_get0_object(X509_ATTRIBUTE *attr)
302{
303	if (attr == NULL) return(NULL);
304	return(attr->object);
305}
306
307void *X509_ATTRIBUTE_get0_data(X509_ATTRIBUTE *attr, int idx,
308					int atrtype, void *data)
309{
310	ASN1_TYPE *ttmp;
311	ttmp = X509_ATTRIBUTE_get0_type(attr, idx);
312	if(!ttmp) return NULL;
313	if(atrtype != ASN1_TYPE_get(ttmp)){
314		X509err(X509_F_X509_ATTRIBUTE_GET0_DATA, X509_R_WRONG_TYPE);
315		return NULL;
316	}
317	return ttmp->value.ptr;
318}
319
320ASN1_TYPE *X509_ATTRIBUTE_get0_type(X509_ATTRIBUTE *attr, int idx)
321{
322	if (attr == NULL) return(NULL);
323	if(idx >= X509_ATTRIBUTE_count(attr)) return NULL;
324	if(!attr->single) return sk_ASN1_TYPE_value(attr->value.set, idx);
325	else return attr->value.single;
326}
327